Flush bolt.



A. A. PAGE.

FLUSH BOLT.

APPLIOATION FILED NOV. 16, 1912.

Patented Nov. 10, 1914.

INVENTOR.

WITNESSES:

A T T ORNE Y6.

TH" NORRIS P'ETERS co, PHOTO-urn WASHING TON. D L

UNITED STATES PATENT OFFICE.

41.31am A. men, or EAST HAVEN, CONNEC ICUT, nssrenor. TosAnennT & COMPANY.

or new HAVEN, CONNECTICUT, A CORPORATION or CONNECTICUT. j, l

rnnsn BoLT.

i Specification of Letters Patent.

Patented Nov. 10,

Application filed. November 16, 1912. Serial No. 731,312.

ToaZZ whom it may concern: if q l Be it known that I, ALBERT A. Peon, a

citizen of the United States, residing in East Haven, county of New Haven, and

i hold the bolt in its protracted and retracted positions respectively; to furnish means for effectively housing and protecting certain operative parts and for insuring the mortising of the door or other part to an extent suliicient to prevent binding; and to in crease the simplicity, strength and durability of devices of this general class.

To these and other ends the invention consists 1n the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing, illustrating a preferred embodiment of the invention, Figure 1 is a side elevation of the flush bolt showingthe bolt proper in its retracted position, Fig. 2 is a similar view show ing the bolt protracted, Fig. 3 is a front face view of the device, Fig. 4 is a rear face view, Fig. 5. is a section on line 55 of Fig. 1, Fig. 6 is a section on line 6-6 of Fig. 2, and Fig. 7 is a fragmentary detail section on line 7-7 of Fig. 4:.

Referring to the drawing, 10 indicates the usual face plate or supporting plate having the customary longitudinal recess or cutaway portion 11 in which the actuating lever or finger piece 12 is housed. The cusor guides 14, 15.

tornary bolt 13 is slidably mounted on the rear face of the plate 10in perforated lugs The device illustrated is what is termed an extension flush bolt, the bolt 13 being provided with an extension rod or bolt 16, (only partially shown) butthis feature of the construction is not material to the present invention. 1

In carrying out my invention, I provid the face plate 10 with integral rearwardlv extending checks or side plates 17 located alongside the recess 11, and the lever 12 is pivoted or fulcrumed between these cheeks or side plates by means of a pivot pin 18 1 extending across the space between, {the checks and secured to the latter at its re-.

spective ends. The pivot 18 is locatedintermediate the manipulating end 12 ofr the lever 12 and the opposite end 12" of said lever, which latter end is connected with the bolt 13 by means of a link 19. Hence it will be understood that the lever 12is a lever of the first order, and as a result a very powerful leverage may be exerted on .thelink 19 and bolt 13 when the fulcrum is located nearer to the end .12 'of the lever than to the end 12, as shown.

Theworking end 19" of the lever: 12 is preferably bifurcated or forked and pivotal connection with the link 19 is effected by setting the adjacent end of the link in the forked portion of the lever and pinning it therein by means of a pivot pin 12. The connection between the opposite end of the link and the adjacent end of the bolt is also preferably effected in the same way, the bolt having a forked extremity 13 in which the adjacent end of the link is pivotally secured by a pin 19 The link-connected end of the lever is rounded off or tapered at opposite sides to form a nose, on which a spring or springs 20 act to hold the bolt in the re tracted position of Fig. l or the protracted position of Fig. 2. I prefer to employ two leaf springs 20 attached to the supporting plate at 21 and having bowed portions 2O extending parallel to each other and acting on the nose 12 at opposite sides of the link, as shown in Fig. 1. mally urge the end portion or nose 12" of These springs northe lever toward the face of the supporting plate in order to fully protract or retract the bolt and hold the lever substantially within the lines of the supporting plate, as shown in Fig. 1. l

The operation of the device will be obvious for the most part from the foregoing description. Assuming the parts to be in the position shown in Fig. 1, the oscillation of the lever 12 on its pivot 18 will cause the i springs 20 to be forced backward from the face of the plate, thereby putting them under increased tension, and as the inanipulating end of the lever passes beyond the cen ter line ofthe pin 1.8 (which may be repre sented by the section line 5--5 of Fig. 1) the springs will force the lever into the pa of the lever under the influence of the springs will obviously cause the bolt 13 to be moved quickly from its partly protracted position into its fully protracted position, as is usual in devices of this character. The described operations are reversed when the lever is lifted from the position shown in gig. 2 for the purpose of retracting the olt.

The cheeks or side plates 17 not only serve to house and protect the springs but also to guide the link 19, for which purpose said cheeks are provided with lateral extremities 22 confining the link between them, as shown inFig. 4. Moreover, these cheeks have the even more important function of preventing the parts from binding whenthe lever is swung out into a POSltIOII' perpendicular to the face of the supporting plate. The width ofthe cheeks is so chosen that even when the parts are in this position, the cheeks will extend rearwardly beyond the lever springs and link, and therefore in cuttin suflieiently deep for the cheeks, te carpenter may be sure that when the device is operated none of the parts will bind against the rear or bottom Wall of the mortise. In some prior devices considerable trouble in this respect has been encountered as a result of making the mortise too shallow, but this defect is completely remedied by my present construction.

\Vithout limiting myself to the construction shown, I claim:

1. In a flush bolt, the combination with a a mortise supporting plate having separated cheek members projecting laterally therefrom, a sliding bolt carried by the plate and arranged substantially parallel therewith, a pivoted link connected with the bolt, a lever pivotally supported between vthe cheek plates and having a short arm pivotally "connected with the lower end of the link,

the width of the lever being substantially equal to the space between the cheek plates, and a plurality of spring parts secured to the supporting plate and engaging the lever on opposite sides of its pivotal connection with the link and lying adjacent. the sides of the cheek. plate, substantially as described.

s 2. In a flush bolt, the combination with a. supporting plate having laterally extending cheek members spaced apart, each cheek being provided with inturn ed end portions leaving an intermediate space therebetween, a sliding bolt'on the supporting plate, a link pivotally secured to t e bolt and projecting between the inturned ortions of the cheek plate whereby the linh in its movement, a lever pivoted to the plate and havin its short arm pivotally connected to the ink, and springs engaging the short arm of the lever, substantially as described. I

In witness whereof, I have hereunto set my hand on the 15th day of November 1912.

ALBERT A. PAGE;

Witnesses:

HENRY H. MUNSON, CARL W. CARLSON.

Copies of this patent may be obtained or five cents each, by addressing the commissioner cl Patents.

Washington, D. G." 1

is guided 

